Scarifier.



D. C. BOYD. SGARIFIER.

APPLwATIoN FILED 1541112.24. 1913.

Patented Apr. 14, 1914.

2 SHEETS-SHEET 1.

HUMA# D. C. BOYD.

SGARIPIEB.

APPLICATION FILED 11113.24, 1913.

1,093,104. l 'Patented Apr.14,1914

2 SHEETS-SHEET 2.

^ 'Hill-l1 u/ I I`IIII|| DAVID c.' BOYD, or GALIoN, oIIIo, AssIGNoR To THE eALIoN IRON wonKs AND MANUFACTURING COMPANY, or GALIoN, oHIo, A CORPORATION or oHIo.

SCARIFIER.

Locator.

Specification of Letters Patent.

Patenten apr.. ia, ieri.

To all 'whom t may concern Be it known that I, DAVID C. BOYD, a citizen of the United States, residing at Galion, in the county of Crawford and State of Ohio, have invented certain new and useful Improvements in S'carifiers, of which the following is a specification.

VThis invention comprehends certain new and useful improvements in road machinery for use in making and repairing roads and relates particularly to what are known as scariflers. p

The invention has for its primary object a simple, strong and durable scarifier, the parts of which are so constructed and arranged that they will operate eiciently in breaking or cutting up the surface of a road to be repaired, which will be capable of withstanding to a maximum degree, the hard service which a road building machine is called upon to perform and will dig firmly into the material and effectively break the same up, no matterhow hard the road may become and which will embody a novel arrangement of reversible teeth and a novel arrangement ofv parts for holding said teeth in position, whereby the teeth may be reversedend for end whenever desired, their serviceability being thereby enhanced.

The invention also has for one of its main objects an apparatus of this character which may be easily secured to the supporting frame-work of a road grader'or scraper in lieu of the scraping blade and its supporting circle and draw bars whereby a combination machine may be produced, the machine, from a practical standpoint, thereby possessing this additional advantage of susceptibility of being changed from a scarier to a grader or vice versa. v

A still further object of the invention is the provision of an improved scarifer embodying two series of forwardly converging teeth, with a single tooth at the apex or forward end of the frame, common to both series, said tooth being preferably somewhat larger than the other teeth and being designed to first enter the materialv and break Y 1t away, the rear teeth on each side followving after in 'regular succession, the side pressure being equalized and the scarier v thereby following the lead after the front tooth which, in turn, as is manifest, will follow the line of draft. And the invention also aims to generally improve devices of this character so as to render them more useful and commercially desirable.

With these and other objects in view, as will more fully appear as the description proceeds, the invention consists in certain constructions, arrangements and combinations of the parts that I shall hereinafter `fully describe and claim.

For a full understanding of the invention, reference is to be had to the following descrlption and accompanying drawings, in which Figure 1 is a side elevation of a scarier embodying the improvements of my inventlon.- Fig. 2 is a sectional side elevation through one side of the main frame of the device. Fig. 3 is a transverse sectional view 'to in the following description and designated in the accompanying drawings by like reference characters.

Referring to the drawings, A designates as a whole, the main frame of my improved scarifier, the sides of said frame converging in a forward direction and each consisting of a pair of -preferably channeled bars l disposed in laterally spaced relation to each other with their flanges projecting outwardly, as clearly illustrated in Fig. 3. Teeth or blades 2 of any desired number are disposed at any predetermined intervals between the channeled bars. 1 of the Sides of the main frame-work, said teeth, as will clearly be understood, being thus arranged in two forwardly converging corresponding series with a single tooth at the front, common to both series. Preferably, the foremost tooth is larger than the others and is set squarely in the front end of the scarifier frame. It is received in an upwardly and rearwardly inclined opening formed for it in a substantially V-shaped casting or block 3 secured in between the channeled bars 1 at the extreme front end thereof, transverse bolts 4: passing through the bars and through transversely through the foremost tooth itself at the middle of the latter. Thus, it will be seen that this tooth is firmly held in position. It is to be particularly noted that the other4 teeth are devoid of bolt holes. They are engaged on their front and rear edges by the adjacent edges of blocks 5 that are received in between the frame bars 1 and interposed between the teeth, as clearly illustrated in Fig. 5, said blocks 5 being formed on said adjoining edges with beveled or wedge-shaped lip extensions 6 designed to engage, with their oblique edges,

the side faces of the teeth, whereby the teeth will be securely clamped between'these beveled lips and always stand straight with the line of draft. Itrwill be seen that the j blocks 5, like the block 3, are formed in their side faces with recesses 7, in which the channeled brace bars 1 lit, transverse bolts 8 passing throu li the Aframe bars and through the bloc is 5 so as to produce -a strong and rigid structure. The teeth project upwardly above theframe bars l and are provided with cutting and digging edges on both ends, whereby they may be reversed when required and the serviceability of the machine thereby increased to a marked degree.

Coperating with the blocks for pose of securely holdingthe teeth in position and for directly retaining the teeth or to prevent them from slipping upward and out of position, I have provided retaining bars 9 which, in the present instance, are of channel formation with their flanges projecting upward, said retaining bars contacting with the upwardly dgis osed extremities of the teeth, 'as clearly ilustrated in the drawings, and being secured in psition by the purl tie-bolts 10 arranged in transversely disposed pairs and disposed at any desired intervals alon the bars 9, said tie-bolts preferably extening through pipe ferrules or bushings 11 'which are used freely for the purpose of properly spac the tooth-retaining bars from the main rame-work and for properly holding said; retaining bars to the bars 1 in an evident manner.

In order to' support the, frame-work A in its operative position, I have provided the draw bars 12 which are connected to the malin frame bars 1 and tooth-retaining bars 9 by bolts 18 which pass therethrough and through transversely extendin I-beams 14 which are interposed between t e draw bars and the. tooth-retaining bars. In the present embodiment of the invention, there are two of these I-beams employed, although it is to be understood that the invention is not limited inthis regard, andthe draw bars 12 are connected near their forward ends to brace bars 15, the lower ends of which are connected to a V-shaped block or castin 16 bolted to the tooth retaining bars 9 at the forstood that while Ward extremitiesv of the latter `where they come together. The draw bars 12 are provided at their forward ends with a clevis l17, whereby they may be conveniently connected to the traveling frame-workI or draft mechanism, and the rear ends of said draw bars are, in the present instance, provided with clips or stirrups 18 so that they may be easily secured to suspension link rods yand the entire lscarifier frame with its component parts held in the required position, vertically considered, at the will of the operator, according to the particular work in hand and how deep it is desired the teeth shall cut.

From the foregoing description in connection with the accompanying drawings, the operation of my improved scarifier will be apparent. In the practical use of the device, it is connected to the traveling frame-work of the machine,for example, in lieu of the ordinary draw bars, scraper blade and circle, and itis adjusted vertically according to the requirements of t-lie case, whereby as the machine is drawn forward by a traction engine or otherwise, the large front tooth will enter the material and break it away. The rear teeth on each side will follow after\in regular succession and on account of there being a row or seriesA of teeth on each side,

the side pressure will be equalized and the i scariier will follow the lead from the front tooth whichfas is evident, will follow the line of draft. yIt will be noted that with the exception of the foremost tooth, there are no bolt holes through the teeth to weaken them, thatthey are held rmly in position by means which may be cheaply and easily manufactured and readily assembled and that they may be easily reversed whenever desired. While the accompanying drawings illustrate what I believe to be the preferred embodiment of my invention, itis to be understood that the invention is not limitedvthereto, but that various changes may be made in the construction, arrangement and proportions of the p'arts without departing from the scope of t e invention, as defined in the appended claims. It is also to be underdesigned for use in connection with that well known type of road machine which embodies wheeled frame-work with means for raising and lowering the front end of draw bars, with means for laterally shifting the draw bars, and with means for raising one draw bar higher than the other, as required, and is also primarily designed'for -use in a combination road machine in substitution for the ordinary draw bars'and A scraping blade and circle connected thereto, yet, the invention is not limited in this regard, as is clearly within the purview of my invention to employ any form` or type of traveling frame-work or draft device for operating my improved scaritier.

What I claim is :q

1. A Y road scarifier, including a framework, embodying sides consisting of laterally spaced bars, teeth disposed between said bars, blocks interposed between said bars and connected thereto and spacing said teeth from each other, and teeth-retaining bars connected to said frame-work and serving to Vprevent the upward displacement of said teeth.

2. A road scarifier, including a framework embodying side bars, a plurality of teeth mounted between said side bars and projecting both belowV and above the latter, tooth-retaining bars mounted above the said bars and engaging the upper ends of the teeth, and tie bolts connecting said toothretaining bars to the sidebars.

3. A road scarifier, including a :tramework, embodying sides which consist of bars disposed'in laterally spaced relation to each other, teeth interposed between said bars',v and blocksA disposed between said bars and between the teeth, said blocks being formed ontheir adjoining edgeswith lips engaging A the sides of said teeth andholdin the latter in' oblique position relative to the ars.

4. A road scarier, including a frame-- work, the sides of which consist of laterally spaced bars, teeth disposed Ibetween .said bars, and blocks arranged between said bars` and interposed between the teeth, said bloplrs being formed on their adjoinin edges with beveled lips adapted to engage t e side faces of the teeth so as to hold the latter in oblique position relative to the length of the side ars.

5. A road scarifer, including a lframework, teeth carried by said frame-work and projecting above the same, tooth-retaining bars engaging the upper ends of the teeth and connected to the'rame-work, draw bars above said tooth-retaining bars, and transverse beams connected to the tooth-retaining bars and the draw bars.

6. A. road scarifier, including a framework provided with tooth-retaining bars, teeth carried by said frame-work and projecting above the same and .engaging with their upper edsthe lower 'faces of the ltoothretaining bars, transversely extending beams connected to the tooth-retaining bars., and draw bars connected to the transverse beams,

said draw bars beingpprovided at their lforward ends with a clevis and at their rear ends with stirrups, as and for the purpose set forth. v y

In testimony whereof I aiix my signature in presence of two witnesses.

havin c. Born. 

